scholarly journals Štúdium vplyvu chloridov a bromidov na kritickú micelovú koncentráciu a parciálny mólový objem kvartérnej amóniovej soli

2022 ◽  
Vol 116 (1) ◽  
pp. 42-47
Author(s):  
Eva Salanci ◽  
Fils Andriamainty ◽  
Dominika Adamove ◽  
Roman Mikláš
Keyword(s):  
Aqueous Solution ◽  
Critical Micelle Concentration ◽  
Gibbs Energy ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Molar Gibbs Energy ◽  
Ammonium Salts ◽  
Distilled Water ◽  
Salt Solutions ◽  
Ionization Degree

The critical micelle concentration (CMC) of the selected surfactant belonging to quaternary ammonium salts with chemical designation N,N-dimethyl-N-(3-((1R,5S)-1,8,8-trimethyl-2,4-dioxo-3-azabicyclo[3.2.1]octane-3yl)propyl)hexadecane-1-amine bromide was determined. Simultaneously, the effect of the addition of various concentrations of NaCl, KCl, NaBr, and KBr salts on the CMC value of the substance was observed and compared with those obtained in an aqueous solution at T = 296,15 K. Based on the results obtained, it was concluded that NaCl and KCl salts decreased the critical micelle concentration, while NaBr and KBr salts did not support micellization and CMC values therefore increased. In the case of solutions of a substance in the salt environment, when compared to the substance's solution in distilled water, a decrease in partial molar volume was observed. From the concentration density dependencies of the substance, an ionization degree of α was determined. Finally, the molar Gibbs energy ∆G° was also calculated and found negative for all salt solutions, while increase with their increasing concentration.

Preparation of Stilbene-Eighteen Alkyl Quaternary Ammonium Salts as Fluorescent Brightening Materials and Surfactants

2013 ◽  
Vol 690-693 ◽  
pp. 615-618 ◽  
Author(s):  
Mao Sheng Wan ◽  
Cheng Bo Cao ◽  
Hai Yang Sun ◽  
Ming Yang Wang ◽  
Wen Qing Ma
Keyword(s):  
Surface Tension ◽  
Critical Micelle Concentration ◽  
Cotton Fiber ◽  
Quaternary Ammonium ◽  
Fluorescence Emission ◽  
Emission Spectra ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Fluorescence Emission Spectra ◽  
New Compounds

Three stilbene-eighteen alkyl quaternary ammonium salts were synthesized through three-step reactions. The physical properties of compounds were characterized by UV and fluorescence emission spectra. The new compounds were applied to cotton fiber as fluorescent brightening agents and their performances were evaluated by measuring the degree of whiteness. The surface tension (γ) and the Critical Micelle Concentration (CMC) of compounds were evaluated. The results showed that the three compounds could greatly reduce the surface tension of aqueous solutions.

Synthesis and stability of 1-aminoalkylphosphonic acid quaternary ammonium salts

2021 ◽  
Author(s):  
Tomasz K. Olszewski ◽  
Anna Brol
Keyword(s):  
Phosphonic Acid ◽  
Quaternary Ammonium ◽  
Alkylating Agent ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Aminoalkylphosphonic Acid

An effective protocol for quaternization of simple 1-aminoalkylphosphonic acids under basic conditions and using Me2SO4 as convenient alkylating agent is reported. In the course of reaction phosphonic acid quaternary ammonium...

scholarly journals Green Accelerated Synthesis, Antimicrobial Activity and Seed Germination Test of Quaternary Ammonium Salts of 1,2-bis(4-pyridyl)ethane

Molecules ◽  
2019 ◽  
Vol 24 (13) ◽  
pp. 2424 ◽  
Author(s):  
Tăbăcaru ◽  
Botezatu ◽  
Horincar ◽  
Furdui ◽  
Dinică
Keyword(s):  
Escherichia Coli ◽  
Triticum Aestivum ◽  
Seed Germination ◽  
Quaternary Ammonium ◽  
Pathogenic Bacteria ◽  
Classical Method ◽  
Triticum Aestivum L ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Radicle Growth

A family of fifteen quaternary ammonium salts (QAs), bearing the 1,2-bis(4-pyridyl)ethane core, were obtained using for the first time two different green methods, such as microwave (MW) and ultrasounds (US) irradiation, with very good yields and in much shorter times compared to the classical method, and an assay on their antimicrobial action against Escherichia coli (E. coli) was carried out. While 12 to 24 hours were required for complete alkylation of 1,2-bis(4-pyridyl)ethane by reactive halogenated derivatives in anhydrous solvent under reflux conditions, MW and US irradiation reduced the reaction time and the desired products were achieved in a few min. One of the aims of this study was to evaluate the antibacterial potential of the synthesized QAs against pathogenic bacteria, along with their impact on germination activity of wheat seeds (Triticum aestivum L.). The antibacterial activity of the QAs against Escherichia coli was explored by determining the minimum inhibitory concentration (MIC). The MIC values varied from 0.312 to 2.5 mg/mL, highlighting the lowest values attained for the derivatives containing methoxy, chlorine and benzofurane functional groups. The viability of aerobic bacteria was determined with the Tetrazolium/Formazan Test, a method that was found to be the best alternative approach with respect to the difuzimetric method. Seeds of Triticum aestivum L. were used for the evaluation of the germination indicators, such as seed germination (SG), the relative seed germination (RSG), the relative radicle growth (RRG), and the seed germination index (GI). The toxicity studies of QAs 1, 4 and 7, at two different concentrations, showed no inhibitory effect on seed germination.

Interaction of water-insoluble quaternary ammonium salts with the hydrated silica surface

1996 ◽  
Vol 32 (6) ◽  
pp. 331-334
Author(s):  
V. V. Turov ◽  
O. A. Zaporozhets ◽  
O. Yu. Nadzhafova ◽  
V. V. Sukhan
Keyword(s):  
Quaternary Ammonium ◽  
Silica Surface ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Hydrated Silica
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